Lucene Index Maintenance (Insert, Update and Delete)
1 Mins read
lucene index maintenance, lucene index insert, lucene index update not working, lucene index delete fails, lucene index fast insert, lucene index fast…
Boolean Expression Evaluation using JEP in Java
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There are not many open source library available for Boolean expression evaluation. If we have a requirement of evaluating an expression of…
How to Build fast/efficient cache in Java using SoftReference
3 Mins read
Building cache for a Java application is required many times. Writing an efficient cache can be really helpful for better application performance….
java.sql.SQLException: ORA-00911: invalid character
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java.sql.SQLException: ORA-00911: invalid character solution, java.sql.SQLException: ORA-00911: invalid character root cause,why am i getting java.sql.SQLException: ORA-00911: invalid character,JDBC error java.sql.SQLException: ORA-00911: invalid…
Lucene: Asynchronous Index Writer for faster writing
4 Mins read
I was trying to do some Index writing speed improvement and thought of creating a asynchronous Lucene index writer. This writer provides…
How to access private variables of Java Class - Hacking by reflection
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This example demonstrates how you can do object hacking in Java using the Reflection API. Hacking by reflection is possible through setAccessible()…
Effective Obfuscation: Techniques to empower Java code safety
2 Mins read
Why do you need Obfuscation ? Do you lock your home door every night? You may know that a locked door will…
How to Add User Authentication on Tomcat
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I have seen many people writing their own Login utilities for web application, which is like re-inventing the wheel. Tomcat supports user…
Securing your code: Techniques Beyond Java Obfuscation
3 Mins read
Reverse engineering Java classes is very easy and Obfuscation also can not stop anyone from reverse engineering your proprietary class. but it…
Sorting performance Arrays.sort() vs Collections.sort()
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Many developer are concerned about the performance difference between java.util.Array.sort() java.util.Collections.sort() methods. Which one is faster? Which one to use and when?…